Question: who constituency of the Rajya Sabha for coextensive with of West Bengal?
Paraphrase: who voting demographic of the Rajya Sabha for coextensive with of West Bengal?
SPARQL (Wikidata):  select distinct ?obj where { wd:Q1356 wdt:P3403 ?obj . ?obj wdt:P31 wd:Q57156205 } 
Answer: West Bengal